Keep it simple stupid.
Repairs for the exterior of the house have proceeded from the top down, which meant a few weeks ago I needed to paint the back dormer. I took out the windows to perform maintenance on them, mostly just painting and a bit of puttying. In the process I succeeded in breaking a pane. In the past I had gone to the local hardware store for my glass, but this time I opted to visit a glazier who was a few extra miles down the road.
The store was set up with displays of mirrors and glass doors for shower enclosures. There was one small corner dedicated to modern windows that he was reselling. I found myself wondering what kind of sales he has seeing now that traditional windows with single pane glass were not the norm. I suppose if he was able to sell new windows, rather than repair old, he probably did quite well in the housing bubble of the last few years. But now that the housing bubble had burst...who knows?
The point of going to the glazier was to ask about all my options for fixing the window - single pane, double pane, inserts, low emissivity glass, tinted glass, etc. He threw in a few other options that I wasn't considering too, like replacing the entire window or putting on a new storm. We talked for about 15 minutes on all the options.
In the end, I bought a double strength pane of glass. Standard, single pane glass is about 1/16th of an inch thick. As you might guess, DS glass is 1/8th of an inch thick, so less likely to break, although twice as heavy. When I asked him how much for the 8" by 12" piece of glass, it came to $2.65. I'd say it wasn't even worth the time it took him to tell me about my options. On the upside though, I'll be going to him in the future, as I can't get DS glass from my hardware store.